1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * i2c_pxa.h 4 * 5 * Copyright (C) 2002 Intrinsyc Software Inc. 6 */ 7 #ifndef _I2C_PXA_H_ 8 #define _I2C_PXA_H_ 9 10 #if 0 11 #define DEF_TIMEOUT 3 12 #else 13 /* need a longer timeout if we're dealing with the fact we may well be 14 * looking at a multi-master environment 15 */ 16 #define DEF_TIMEOUT 32 17 #endif 18 19 #define BUS_ERROR (-EREMOTEIO) 20 #define XFER_NAKED (-ECONNREFUSED) 21 #define I2C_RETRY (-2000) /* an error has occurred retry transmit */ 22 23 /* ICR initialize bit values 24 * 25 * 15. FM 0 (100 Khz operation) 26 * 14. UR 0 (No unit reset) 27 * 13. SADIE 0 (Disables the unit from interrupting on slave addresses 28 * matching its slave address) 29 * 12. ALDIE 0 (Disables the unit from interrupt when it loses arbitration 30 * in master mode) 31 * 11. SSDIE 0 (Disables interrupts from a slave stop detected, in slave mode) 32 * 10. BEIE 1 (Enable interrupts from detected bus errors, no ACK sent) 33 * 9. IRFIE 1 (Enable interrupts from full buffer received) 34 * 8. ITEIE 1 (Enables the I2C unit to interrupt when transmit buffer empty) 35 * 7. GCD 1 (Disables i2c unit response to general call messages as a slave) 36 * 6. IUE 0 (Disable unit until we change settings) 37 * 5. SCLE 1 (Enables the i2c clock output for master mode (drives SCL) 38 * 4. MA 0 (Only send stop with the ICR stop bit) 39 * 3. TB 0 (We are not transmitting a byte initially) 40 * 2. ACKNAK 0 (Send an ACK after the unit receives a byte) 41 * 1. STOP 0 (Do not send a STOP) 42 * 0. START 0 (Do not send a START) 43 * 44 */ 45 #define I2C_ICR_INIT (ICR_BEIE | ICR_IRFIE | ICR_ITEIE | ICR_GCD | ICR_SCLE) 46 47 /* I2C status register init values 48 * 49 * 10. BED 1 (Clear bus error detected) 50 * 9. SAD 1 (Clear slave address detected) 51 * 7. IRF 1 (Clear IDBR Receive Full) 52 * 6. ITE 1 (Clear IDBR Transmit Empty) 53 * 5. ALD 1 (Clear Arbitration Loss Detected) 54 * 4. SSD 1 (Clear Slave Stop Detected) 55 */ 56 #define I2C_ISR_INIT 0x7FF /* status register init */ 57 58 struct i2c_pxa_platform_data { 59 unsigned int class; 60 unsigned int use_pio :1; 61 unsigned int fast_mode :1; 62 unsigned int high_mode:1; 63 unsigned char master_code; 64 unsigned long rate; 65 }; 66 #endif 67